I've written the following recursive rule in boost::spirit::x3 but it only seems to compile in g++/clang, not VS2017 (15.5.3):
#include <iostream>
#include <boost/spirit/home/x3.hpp>
namespace lex3
{
namespace x3 = boost::spirit::x3;
x3::rule<struct foo_class> const foo = "foo";
x3::rule<struct bar_class> const bar = "bar";
auto bar_def = *((x3::char_ - "/*") - "*/") >> *(foo > *((x3::char_ - "/*") - "*/"));
auto foo_def = "/*" > bar > "*/";
BOOST_SPIRIT_DEFINE(foo)
BOOST_SPIRIT_DEFINE(bar)
}
int main(int argc, char** argv)
{
std::string input = "/* a /* nested */ comment */";
auto f = input.begin();
auto l = input.end();
if (parse(f, l, lex3::foo) && (f == l))
std::cout << "Parse success.\n";
else
std::cout << "Parse failure (remainder: " << std::string(f, l) << ").\n";
return 0;
}
Coliru link, g++
Coliru link, clang++
How do I make this work in VS2017 (if possible)?
P.S: Platform Toolset is set to v141, ISO standard is set to C++17, boost version is 1.66.0
P.P.S: The compilation errors are as follows
error C2039: 'insert': is not a member of 'boost::spirit::x3::unused_type'
note: see declaration of 'boost::spirit::x3::unused_type'
error C2039: 'end': is not a member of 'boost::spirit::x3::unused_type'
note: see declaration of 'boost::spirit::x3::unused_type'
error C2039: 'begin': is not a member of 'boost::spirit::x3::unused_type'
note: see declaration of 'boost::spirit::x3::unused_type'
I checked out the Boost.Spirit repository on GitHub because my local version was too old and noticed that your example compiles fine with the latest develop
branch but not with the 1.66.0 release (also on Clang and GCC). Bisecting the commit history revealed that this bug was fixed in
ee4943d5891bdae0706fb616b908e3bf528e0dfa
You could either apply the patch from this commit to your installation or wait for the next release.
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